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Finding the Fourth Proportional to 122.40, 168.60 and 96.48

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Solution

The fourth proportional to 122.40, 168.60 and 96.48 is: 132.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.40 : 168.60 = 96.48 : x
  2. Step 2: Convert to fraction form
    122.40/168.60 = 96.48/x
  3. Step 3: Cross multiply
    122.40x = 168.60 × 96.48
  4. Step 4: Simplify right side
    122.40x = 16,266.53
  5. Step 5: Solve for x
    x = 16,266.53/122.40
  6. Step 6: Final answer
    x = 132.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.